Rotational Constants of SiH3D

Abstract

The analysis of the rotational structure of the Si — D stretching fundamental yields the following values: $$B^{\mathrm{\prime \prime }}\text{=2.11±0.01\hspace{0.17em}}{\mathrm{cm}}^{\text{−1}}{\mathrm{,\hspace{0.17em}\hspace{0.17em}B}}^{\mathrm{\prime \prime }}{\mathrm{-B}}^{\prime }\text{=0.019\hspace{0.17em}}{\mathrm{cm}}^{\text{−1}}{\mathrm{,\hspace{0.17em}\hspace{0.17em}\nu }}_0\text{=1594.4±0.1\hspace{0.17em}}{\mathrm{cm}}^{\text{−1}}.$$ The value of the Si — H distance obtained under the assumption that it remains unchanged by isotopic substitution is $$d_{\mathrm{Si-H}}{\text{=1.47}}_7\text{±0.003\hspace{0.17em}}\mathrm{A}.$$